1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152c5c9e3b7238148e5877756616d8fbfafd20bba579a3ad18a30bf54184de1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0085600d-7fdf-4683-a97b-a7b9db13a07b.json and https://artists.proofprofile.net/proofs/artist/0085600d-7fdf-4683-a97b-a7b9db13a07b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0f6a8668223c4caae2762e2b7203a8ccb1ae1fb69d92262f722126c20ffe5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81858124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9ba3dd8c8bf2872e8a7e192f52bf9be455071cfabbc939ba0eddc6b6b3bf06. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8242ff9f8e87bc854b895454945d56ec4a99ed63ccd9980163091436bdd926c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f37f7f11e527243243a4e5848f9e24acc18e929e79f60cca6b60b2c6be3c55. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b255f70d3e728f0d3068d7106ca339e3bf803e0993a2e2801080df95f0625c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64af03227a1f857c825ddacbeb81589f529c6aeafbee35331d78d379dcc9244. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA41S2100974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd5cdcb933f5f0fdf80852c456e6e5228ce679ee1d9c0f552900e0520a7ac6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA41S2100975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ab1f34a269d4383abc44177f2eaf2a066b226af5c3954c44aebf9292d3bdd2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGB2291719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da448e6877e6bfd1058a9a2b54e94a2057c861bc07944b3ad5c84471f9980d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2260106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d7f9914ce35e1c354f683a3bec4f38fee3a72f808dfb04400e557e98621464. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2267080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e67ae6ffcc81f07c58094e33c87cd13c27571c065ca7a14a066deb5f344d605. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52379559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e4ded74108bbaff57c3dff94abc715476d055113bc4b965291a045e4afcba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2308545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dc0742fc88b498f8d3aa20d17de8510f9d61dad54c787eaeeae973ecdb850a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB32368663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee1349e1961abb2beb0aab662d1e541a33f08d8cc171a2da6ce2e97c9738d9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB32368668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87094a283747018356d42bed09f1da3768259515c26809c7c476025df074ded7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB32368671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c0e3af72bafdd32093fde4bb5b6f7a94e1a693d39922da495d7157828a2ba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2415070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ad1da605d6f1a125f141bb45cf861e65461444f0266ff61b187e708377325. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7N2438406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28740fb2d14a526ebe5405cd9ee61682ad6f704fa7691ed24dc6fae934999bde. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52512420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce248d95c195da2305244ec74dcf536365b8a31016cb71f66beb89b055574d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2522204.